The cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) is one of the most important pests on a wide range of crops worldwide. The antibiotic resistance of 10 canola cultivars ‘'Sarigol’, ‘Hayula₄₂₀′, ‘Opera’, ‘Okapi’, ‘Modena’, ‘RGS₀₀₃′, ‘Zarfam’, ‘Licord’, ‘Talaye’, and ‘SLM₀₄₆’) to H. arimgera was evaluated using demographic parameters including life table, reproduction, development, and adult longevity. Larval period ranged from 18.8 to 16.1 d on Hayula₄₂₀ and RGS₀₀₃, respectively. The longest development time of immature stages was on Sarigol and Hayula₄₂₀ (36.8 d) and the shortest one was on Zarfam (34.8 d). The highest daily and total fecundity (1,082.4 and 254.8 eggs, respectively) was on RGS₀₀₃ and the lowest was on Talaye (517.0 and 41.4 eggs, respectively). The r_m values varied from 0.153 on Sarigol to 0.179 on Opera. The net reproductive rate (R_o) was calculated to be lowest on Talaye (157.4) and highest on RGS₀₀₃ (331.5). The comparison of demographic parameters of H. armigera on different cultivars of canola and the cluster analysis revealed that Hayula₄₂₀, Talaye, Sarigol, and SLM₀₄₆ were the most resistant cultivars to this insect. Such results could be useful to develop an integrated pest management strategy of H. armigera on canola cultivars.